PLC - Programmable Logic Controllers

A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.PLCs can range from small modular devices with tens of inputs and outputs (I/O), in a housing integral with the processor, to large rack-mounted modular devices with thousands of I/O, which are often networked to other PLC and SCADA systems. They can be designed for many arrangements of digital and analog I/O, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory. Top 20 programmable logic controller manufacturers 1. Siemens PLC 2. Rockwell Automation / Allen Bradley PLC 3. Mitsubishi Electric PLC 4. Schneider Electric PLC 5. ABB PLC 6. Honeywell Process PLC 7. Omron PLC 8. Hitachi Industrial Equipment Systems PLC 9. IDEC PLC 10. B&R Industrial Automation PLC 11. Bosch Rexroth PLC 12. Koyo Electronics Industries PLC 13. Delta PLC 14. Eaton PLC 15. Keyence PLC 16. LS Electric PLC 17. Panasonic PLC 18. Phoenix Contact PLC 19. Pilz PLC 20. WAGO Kontakttechnik PLC 21. Yokogawa Electric PLC 22. Toshiba PLC